i2c: i2c stack can remove()

More update for new style driver support:  add a remove() method, and
use it in the relevant code paths.

Again, nothing will use this yet since there's nothing to create devices
feeding this infrastructure.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

include/linux/i2c.h

@@ -130,6 +130,7 @@ struct i2c_driver {
 	 * it's done by infrastructure.  (NEW STYLE DRIVERS ONLY)
 	 */
 	int (*probe)(struct i2c_client *);
+	int (*remove)(struct i2c_client *);
 
 	/* driver model interfaces that don't relate to enumeration  */
 	void (*shutdown)(struct i2c_client *);